Coal is formed from plant material falling on saturated soil (swamps marshes & wetlands), the plant material decomposes only very slowly as no oxygen can reach them, this then gets buried by more organic material. then eventually the organic material is lithified forming coal ( rock formation) .
Petrified Wood
The streak of petrified wood is black or brown. The streak can also be white.
...the petrified forest...
Petrified wood.
petrified wood
Petrified wood rates between 7 and 8 on Moh's Hardness Scale
The Petrirfied Forest is a forestis petrified that petrified by wood in the Petrified Forest. Wirten By Valeria Roman Barrios 23
Petrified wood has turned to stone, a type of fossil, It is unlikley that you would be able to burn it.
petrified wood is wood that has had all the bacteria killed out of it by mud, sand, volcanic ash or other matter. The matter then turns the wood into stone. Later the stone turns into probably quarts or opal. Usally because its fossilized it keeps its same pattern and the quarts can turn it into different colors.
Petrified wood is the state stone of Mississippi. This was designated in 1976. Mississippi contains a large petrified forest park and museum.
The boys discovered petrified wood in the stream. The sight of the huge monster left him petrified, too scared to move.
petrified wood